[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs.
Revision 1.66 by root, Sun Nov 4 23:30:53 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>	59	#include <unistd.h>
33	#include <fcntl.h>	60	#include <fcntl.h>
…		…
37	#include <stdio.h>	64	#include <stdio.h>
38		65
39	#include <assert.h>	66	#include <assert.h>
40	#include <errno.h>	67	#include <errno.h>
41	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
42	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
43	#include <sys/time.h>	72	#include <sys/time.h>
44	#include <time.h>	73	#include <time.h>
45		74
		75	/**/
		76
46	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
49	# endif	102	# endif
50	#endif	103	#endif
51		104
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
62	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
63		122
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
67		127
68	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		143
70	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
73		147
74	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
75	ev_tstamp ev_now;
76	int ev_method;
77
78	static int have_monotonic; /* runtime */
79
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		149
84	/*****************************************************************************/	150	/*****************************************************************************/
85		151
86	ev_tstamp	152	typedef struct
		153	{
		154	struct ev_watcher_list *head;
		155	unsigned char events;
		156	unsigned char reify;
		157	} ANFD;
		158
		159	typedef struct
		160	{
		161	W w;
		162	int events;
		163	} ANPENDING;
		164
		165	#if EV_MULTIPLICITY
		166
		167	struct ev_loop
		168	{
		169	# define VAR(name,decl) decl;
		170	# include "ev_vars.h"
		171	};
		172	# undef VAR
		173	# include "ev_wrap.h"
		174
		175	#else
		176
		177	# define VAR(name,decl) static decl;
		178	# include "ev_vars.h"
		179	# undef VAR
		180
		181	#endif
		182
		183	/*****************************************************************************/
		184
		185	inline ev_tstamp
87	ev_time (void)	186	ev_time (void)
88	{	187	{
89	#if HAVE_REALTIME	188	#if EV_USE_REALTIME
90	struct timespec ts;	189	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	191	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	192	#else
94	struct timeval tv;	193	struct timeval tv;
95	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	196	#endif
98	}	197	}
99		198
100	static ev_tstamp	199	inline ev_tstamp
101	get_clock (void)	200	get_clock (void)
102	{	201	{
103	#if HAVE_MONOTONIC	202	#if EV_USE_MONOTONIC
104	if (have_monotonic)	203	if (expect_true (have_monotonic))
105	{	204	{
106	struct timespec ts;	205	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	208	}
110	#endif	209	#endif
111		210
112	return ev_time ();	211	return ev_time ();
113	}	212	}
114		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
		220	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		221
115	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
117	{ \	224	{ \
118	int newcnt = cur; \	225	int newcnt = cur; \
119	do \	226	do \
120	{ \	227	{ \
121	newcnt = (newcnt << 1) \| 4 & ~3; \	228	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	229	} \
123	while ((cnt) > newcnt); \	230	while ((cnt) > newcnt); \
124	\	231	\
125	base = realloc (base, sizeof (base) (newcnt)); \	232	base = realloc (base, sizeof (base) (newcnt)); \
126	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	234	cur = newcnt; \
128	}	235	}
129		236
		237	#define array_free(stem, idx) \
		238	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		239
130	/*****************************************************************************/	240	/*****************************************************************************/
131
132	typedef struct
133	{
134	struct ev_io *head;
135	int events;
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140		241
141	static void	242	static void
142	anfds_init (ANFD *base, int count)	243	anfds_init (ANFD *base, int count)
143	{	244	{
144	while (count--)	245	while (count--)
145	{	246	{
146	base->head = 0;	247	base->head = 0;
147	base->events = EV_NONE;	248	base->events = EV_NONE;
		249	base->reify = 0;
		250
148	++base;	251	++base;
149	}	252	}
150	}	253	}
151		254
152	typedef struct
153	{
154	W w;
155	int events;
156	} ANPENDING;
157
158	static ANPENDING *pendings;
159	static int pendingmax, pendingcnt;
160
161	static void	255	static void
162	event (W w, int events)	256	event (EV_P_ W w, int events)
163	{	257	{
164	if (w->active)	258	if (w->pending)
165	{	259	{
166	w->pending = ++pendingcnt;
167	array_needsize (pendings, pendingmax, pendingcnt, );
168	pendings [pendingcnt - 1].w = w;
169	pendings [pendingcnt - 1].events = events;	260	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		261	return;
170	}	262	}
171	}
172		263
		264	w->pending = ++pendingcnt [ABSPRI (w)];
		265	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		266	pendings [ABSPRI (w)][w->pending - 1].w = w;
		267	pendings [ABSPRI (w)][w->pending - 1].events = events;
		268	}
		269
173	static void	270	static void
174	queue_events (W *events, int eventcnt, int type)	271	queue_events (EV_P_ W *events, int eventcnt, int type)
175	{	272	{
176	int i;	273	int i;
177		274
178	for (i = 0; i < eventcnt; ++i)	275	for (i = 0; i < eventcnt; ++i)
179	event (events [i], type);	276	event (EV_A_ events [i], type);
180	}	277	}
181		278
182	static void	279	static void
183	fd_event (int fd, int events)	280	fd_event (EV_P_ int fd, int events)
184	{	281	{
185	ANFD *anfd = anfds + fd;	282	ANFD *anfd = anfds + fd;
186	struct ev_io *w;	283	struct ev_io *w;
187		284
188	for (w = anfd->head; w; w = w->next)	285	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
189	{	286	{
190	int ev = w->events & events;	287	int ev = w->events & events;
191		288
192	if (ev)	289	if (ev)
193	event ((W)w, ev);	290	event (EV_A_ (W)w, ev);
194	}	291	}
195	}	292	}
196		293
197	/*****************************************************************************/	294	/*****************************************************************************/
198		295
199	static int *fdchanges;
200	static int fdchangemax, fdchangecnt;
201
202	static void	296	static void
203	fd_reify (void)	297	fd_reify (EV_P)
204	{	298	{
205	int i;	299	int i;
206		300
207	for (i = 0; i < fdchangecnt; ++i)	301	for (i = 0; i < fdchangecnt; ++i)
208	{	302	{
…		…
210	ANFD *anfd = anfds + fd;	304	ANFD *anfd = anfds + fd;
211	struct ev_io *w;	305	struct ev_io *w;
212		306
213	int events = 0;	307	int events = 0;
214		308
215	for (w = anfd->head; w; w = w->next)	309	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
216	events \|= w->events;	310	events \|= w->events;
217		311
218	anfd->events &= ~EV_REIFY;	312	anfd->reify = 0;
219		313
220	if (anfd->events != events)
221	{
222	method_modify (fd, anfd->events, events);	314	method_modify (EV_A_ fd, anfd->events, events);
223	anfd->events = events;	315	anfd->events = events;
224	}
225	}	316	}
226		317
227	fdchangecnt = 0;	318	fdchangecnt = 0;
228	}	319	}
229		320
230	static void	321	static void
231	fd_change (int fd)	322	fd_change (EV_P_ int fd)
232	{	323	{
233	if (anfds [fd].events & EV_REIFY)	324	if (anfds [fd].reify \|\| fdchangecnt < 0)
234	return;	325	return;
235		326
236	anfds [fd].events \|= EV_REIFY;	327	anfds [fd].reify = 1;
237		328
238	++fdchangecnt;	329	++fdchangecnt;
239	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
240	fdchanges [fdchangecnt - 1] = fd;	331	fdchanges [fdchangecnt - 1] = fd;
241	}	332	}
242		333
		334	static void
		335	fd_kill (EV_P_ int fd)
		336	{
		337	struct ev_io *w;
		338
		339	while ((w = (struct ev_io *)anfds [fd].head))
		340	{
		341	ev_io_stop (EV_A_ w);
		342	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		343	}
		344	}
		345
243	/* called on EBADF to verify fds */	346	/* called on EBADF to verify fds */
244	static void	347	static void
245	fd_recheck (void)	348	fd_ebadf (EV_P)
246	{	349	{
247	int fd;	350	int fd;
248		351
249	for (fd = 0; fd < anfdmax; ++fd)	352	for (fd = 0; fd < anfdmax; ++fd)
250	if (anfds [fd].events)	353	if (anfds [fd].events)
251	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
252	while (anfds [fd].head)	355	fd_kill (EV_A_ fd);
		356	}
		357
		358	/* called on ENOMEM in select/poll to kill some fds and retry */
		359	static void
		360	fd_enomem (EV_P)
		361	{
		362	int fd;
		363
		364	for (fd = anfdmax; fd--; )
		365	if (anfds [fd].events)
253	{	366	{
254	event ((W)anfds [fd].head, EV_ERROR);	367	close (fd);
255	ev_io_stop (anfds [fd].head);	368	fd_kill (EV_A_ fd);
		369	return;
256	}	370	}
		371	}
		372
		373	/* susually called after fork if method needs to re-arm all fds from scratch */
		374	static void
		375	fd_rearm_all (EV_P)
		376	{
		377	int fd;
		378
		379	/* this should be highly optimised to not do anything but set a flag */
		380	for (fd = 0; fd < anfdmax; ++fd)
		381	if (anfds [fd].events)
		382	{
		383	anfds [fd].events = 0;
		384	fd_change (EV_A_ fd);
		385	}
257	}	386	}
258		387
259	/*****************************************************************************/	388	/*****************************************************************************/
260		389
261	static struct ev_timer **timers;
262	static int timermax, timercnt;
263
264	static struct ev_periodic **periodics;
265	static int periodicmax, periodiccnt;
266
267	static void	390	static void
268	upheap (WT *timers, int k)	391	upheap (WT *heap, int k)
269	{	392	{
270	WT w = timers [k];	393	WT w = heap [k];
271		394
272	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
273	{	396	{
274	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
275	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
276	k >>= 1;	399	k >>= 1;
277	}	400	}
278		401
279	timers [k] = w;	402	heap [k] = w;
280	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
281		404
282	}	405	}
283		406
284	static void	407	static void
285	downheap (WT *timers, int N, int k)	408	downheap (WT *heap, int N, int k)
286	{	409	{
287	WT w = timers [k];	410	WT w = heap [k];
288		411
289	while (k < (N >> 1))	412	while (k < (N >> 1))
290	{	413	{
291	int j = k << 1;	414	int j = k << 1;
292		415
293	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
294	++j;	417	++j;
295		418
296	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
297	break;	420	break;
298		421
299	timers [k] = timers [j];	422	heap [k] = heap [j];
300	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
301	k = j;	424	k = j;
302	}	425	}
303		426
304	timers [k] = w;	427	heap [k] = w;
305	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
306	}	429	}
307		430
308	/*****************************************************************************/	431	/*****************************************************************************/
309		432
310	typedef struct	433	typedef struct
311	{	434	{
312	struct ev_signal *head;	435	struct ev_watcher_list *head;
313	sig_atomic_t gotsig;	436	sig_atomic_t volatile gotsig;
314	} ANSIG;	437	} ANSIG;
315		438
316	static ANSIG *signals;	439	static ANSIG *signals;
317	static int signalmax;	440	static int signalmax;
318		441
319	static int sigpipe [2];	442	static int sigpipe [2];
320	static sig_atomic_t gotsig;	443	static sig_atomic_t volatile gotsig;
321	static struct ev_io sigev;	444	static struct ev_io sigev;
322		445
323	static void	446	static void
324	signals_init (ANSIG *base, int count)	447	signals_init (ANSIG *base, int count)
325	{	448	{
326	while (count--)	449	while (count--)
327	{	450	{
328	base->head = 0;	451	base->head = 0;
329	base->gotsig = 0;	452	base->gotsig = 0;
		453
330	++base;	454	++base;
331	}	455	}
332	}	456	}
333		457
334	static void	458	static void
…		…
336	{	460	{
337	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
338		462
339	if (!gotsig)	463	if (!gotsig)
340	{	464	{
		465	int old_errno = errno;
341	gotsig = 1;	466	gotsig = 1;
342	write (sigpipe [1], &gotsig, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
343	}	469	}
344	}	470	}
345		471
346	static void	472	static void
347	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
348	{	474	{
349	struct ev_signal *w;	475	struct ev_watcher_list *w;
350	int sig;	476	int signum;
351		477
		478	read (sigpipe [0], &revents, 1);
352	gotsig = 0;	479	gotsig = 0;
353	read (sigpipe [0], &revents, 1);
354		480
355	for (sig = signalmax; sig--; )	481	for (signum = signalmax; signum--; )
356	if (signals [sig].gotsig)	482	if (signals [signum].gotsig)
357	{	483	{
358	signals [sig].gotsig = 0;	484	signals [signum].gotsig = 0;
359		485
360	for (w = signals [sig].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
361	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
362	}	488	}
363	}	489	}
364		490
365	static void	491	static void
366	siginit (void)	492	siginit (EV_P)
367	{	493	{
		494	#ifndef WIN32
368	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
369	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
370		497
371	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
372	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
373	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
374		502
375	ev_io_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
376	ev_io_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
377	}	506	}
378		507
379	/*****************************************************************************/	508	/*****************************************************************************/
380		509
381	static struct ev_idle **idles;	510	#ifndef WIN32
382	static int idlemax, idlecnt;
383
384	static struct ev_prepare **prepares;
385	static int preparemax, preparecnt;
386
387	static struct ev_check **checks;
388	static int checkmax, checkcnt;
389
390	/*****************************************************************************/
391		511
392	static struct ev_child *childs [PID_HASHSIZE];	512	static struct ev_child *childs [PID_HASHSIZE];
393	static struct ev_signal childev;	513	static struct ev_signal childev;
394		514
395	#ifndef WCONTINUED	515	#ifndef WCONTINUED
396	# define WCONTINUED 0	516	# define WCONTINUED 0
397	#endif	517	#endif
398		518
399	static void	519	static void
400	childcb (struct ev_signal *sw, int revents)	520	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
401	{	521	{
402	struct ev_child *w;	522	struct ev_child *w;
		523
		524	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		525	if (w->pid == pid \|\| !w->pid)
		526	{
		527	ev_priority (w) = ev_priority (sw); /* need to do it now */
		528	w->rpid = pid;
		529	w->rstatus = status;
		530	event (EV_A_ (W)w, EV_CHILD);
		531	}
		532	}
		533
		534	static void
		535	childcb (EV_P_ struct ev_signal *sw, int revents)
		536	{
403	int pid, status;	537	int pid, status;
404		538
405	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	539	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
406	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	540	{
407	if (w->pid == pid \|\| w->pid == -1)	541	/* make sure we are called again until all childs have been reaped */
408	{	542	event (EV_A_ (W)sw, EV_SIGNAL);
409	w->status = status;	543
410	event ((W)w, EV_CHILD);	544	child_reap (EV_A_ sw, pid, pid, status);
411	}	545	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		546	}
412	}	547	}
		548
		549	#endif
413		550
414	/*****************************************************************************/	551	/*****************************************************************************/
415		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
416	#if HAVE_EPOLL	556	#if EV_USE_EPOLL
417	# include "ev_epoll.c"	557	# include "ev_epoll.c"
418	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
419	#if HAVE_SELECT	562	#if EV_USE_SELECT
420	# include "ev_select.c"	563	# include "ev_select.c"
421	#endif	564	#endif
422		565
423	int	566	int
424	ev_version_major (void)	567	ev_version_major (void)
…		…
430	ev_version_minor (void)	573	ev_version_minor (void)
431	{	574	{
432	return EV_VERSION_MINOR;	575	return EV_VERSION_MINOR;
433	}	576	}
434		577
435	int ev_init (int flags)	578	/* return true if we are running with elevated privileges and should ignore env variables */
		579	static int
		580	enable_secure (void)
436	{	581	{
		582	#ifdef WIN32
		583	return 0;
		584	#else
		585	return getuid () != geteuid ()
		586	\|\| getgid () != getegid ();
		587	#endif
		588	}
		589
		590	int
		591	ev_method (EV_P)
		592	{
		593	return method;
		594	}
		595
		596	static void
		597	loop_init (EV_P_ int methods)
		598	{
437	if (!ev_method)	599	if (!method)
438	{	600	{
439	#if HAVE_MONOTONIC	601	#if EV_USE_MONOTONIC
440	{	602	{
441	struct timespec ts;	603	struct timespec ts;
442	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
443	have_monotonic = 1;	605	have_monotonic = 1;
444	}	606	}
445	#endif	607	#endif
446		608
447	ev_now = ev_time ();	609	rt_now = ev_time ();
448	now = get_clock ();	610	mn_now = get_clock ();
		611	now_floor = mn_now;
449	diff = ev_now - now;	612	rtmn_diff = rt_now - mn_now;
450		613
		614	if (methods == EVMETHOD_AUTO)
		615	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		616	methods = atoi (getenv ("LIBEV_METHODS"));
		617	else
		618	methods = EVMETHOD_ANY;
		619
		620	method = 0;
		621	#if EV_USE_WIN32
		622	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		623	#endif
		624	#if EV_USE_KQUEUE
		625	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		626	#endif
		627	#if EV_USE_EPOLL
		628	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		629	#endif
		630	#if EV_USE_POLL
		631	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		632	#endif
		633	#if EV_USE_SELECT
		634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		635	#endif
		636	}
		637	}
		638
		639	void
		640	loop_destroy (EV_P)
		641	{
		642	int i;
		643
		644	#if EV_USE_WIN32
		645	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		646	#endif
		647	#if EV_USE_KQUEUE
		648	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		649	#endif
		650	#if EV_USE_EPOLL
		651	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		652	#endif
		653	#if EV_USE_POLL
		654	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		655	#endif
		656	#if EV_USE_SELECT
		657	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		658	#endif
		659
		660	for (i = NUMPRI; i--; )
		661	array_free (pending, [i]);
		662
		663	array_free (fdchange, );
		664	array_free (timer, );
		665	array_free (periodic, );
		666	array_free (idle, );
		667	array_free (prepare, );
		668	array_free (check, );
		669
		670	method = 0;
		671	/TODO/
		672	}
		673
		674	void
		675	loop_fork (EV_P)
		676	{
		677	/TODO/
		678	#if EV_USE_EPOLL
		679	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		680	#endif
		681	#if EV_USE_KQUEUE
		682	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		683	#endif
		684	}
		685
		686	#if EV_MULTIPLICITY
		687	struct ev_loop *
		688	ev_loop_new (int methods)
		689	{
		690	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		691
		692	loop_init (EV_A_ methods);
		693
		694	if (ev_method (EV_A))
		695	return loop;
		696
		697	return 0;
		698	}
		699
		700	void
		701	ev_loop_destroy (EV_P)
		702	{
		703	loop_destroy (EV_A);
		704	free (loop);
		705	}
		706
		707	void
		708	ev_loop_fork (EV_P)
		709	{
		710	loop_fork (EV_A);
		711	}
		712
		713	#endif
		714
		715	#if EV_MULTIPLICITY
		716	struct ev_loop default_loop_struct;
		717	static struct ev_loop *default_loop;
		718
		719	struct ev_loop *
		720	#else
		721	static int default_loop;
		722
		723	int
		724	#endif
		725	ev_default_loop (int methods)
		726	{
		727	if (sigpipe [0] == sigpipe [1])
451	if (pipe (sigpipe))	728	if (pipe (sigpipe))
452	return 0;	729	return 0;
453		730
454	ev_method = EVMETHOD_NONE;	731	if (!default_loop)
455	#if HAVE_EPOLL	732	{
456	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	733	#if EV_MULTIPLICITY
		734	struct ev_loop *loop = default_loop = &default_loop_struct;
		735	#else
		736	default_loop = 1;
457	#endif	737	#endif
458	#if HAVE_SELECT
459	if (ev_method == EVMETHOD_NONE) select_init (flags);
460	#endif
461		738
		739	loop_init (EV_A_ methods);
		740
462	if (ev_method)	741	if (ev_method (EV_A))
463	{	742	{
464	ev_watcher_init (&sigev, sigcb);	743	ev_watcher_init (&sigev, sigcb);
		744	ev_set_priority (&sigev, EV_MAXPRI);
465	siginit ();	745	siginit (EV_A);
466		746
		747	#ifndef WIN32
467	ev_signal_init (&childev, childcb, SIGCHLD);	748	ev_signal_init (&childev, childcb, SIGCHLD);
		749	ev_set_priority (&childev, EV_MAXPRI);
468	ev_signal_start (&childev);	750	ev_signal_start (EV_A_ &childev);
		751	ev_unref (EV_A); /* child watcher should not keep loop alive */
		752	#endif
469	}	753	}
		754	else
		755	default_loop = 0;
470	}	756	}
471		757
472	return ev_method;	758	return default_loop;
473	}	759	}
474		760
475	/*****************************************************************************/
476
477	void	761	void
478	ev_prefork (void)	762	ev_default_destroy (void)
479	{	763	{
480	/* nop */	764	#if EV_MULTIPLICITY
481	}	765	struct ev_loop *loop = default_loop;
482
483	void
484	ev_postfork_parent (void)
485	{
486	/* nop */
487	}
488
489	void
490	ev_postfork_child (void)
491	{
492	#if HAVE_EPOLL
493	if (ev_method == EVMETHOD_EPOLL)
494	epoll_postfork_child ();
495	#endif	766	#endif
496		767
		768	ev_ref (EV_A); /* child watcher */
		769	ev_signal_stop (EV_A_ &childev);
		770
		771	ev_ref (EV_A); /* signal watcher */
497	ev_io_stop (&sigev);	772	ev_io_stop (EV_A_ &sigev);
		773
		774	close (sigpipe [0]); sigpipe [0] = 0;
		775	close (sigpipe [1]); sigpipe [1] = 0;
		776
		777	loop_destroy (EV_A);
		778	}
		779
		780	void
		781	ev_default_fork (void)
		782	{
		783	#if EV_MULTIPLICITY
		784	struct ev_loop *loop = default_loop;
		785	#endif
		786
		787	loop_fork (EV_A);
		788
		789	ev_io_stop (EV_A_ &sigev);
498	close (sigpipe [0]);	790	close (sigpipe [0]);
499	close (sigpipe [1]);	791	close (sigpipe [1]);
500	pipe (sigpipe);	792	pipe (sigpipe);
		793
		794	ev_ref (EV_A); /* signal watcher */
501	siginit ();	795	siginit (EV_A);
502	}	796	}
503		797
504	/*****************************************************************************/	798	/*****************************************************************************/
505		799
506	static void	800	static void
507	call_pending (void)	801	call_pending (EV_P)
508	{	802	{
		803	int pri;
		804
		805	for (pri = NUMPRI; pri--; )
509	while (pendingcnt)	806	while (pendingcnt [pri])
510	{	807	{
511	ANPENDING *p = pendings + --pendingcnt;	808	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
512		809
513	if (p->w)	810	if (p->w)
514	{	811	{
515	p->w->pending = 0;	812	p->w->pending = 0;
516	p->w->cb (p->w, p->events);	813	p->w->cb (EV_A_ p->w, p->events);
517	}	814	}
518	}	815	}
519	}	816	}
520		817
521	static void	818	static void
522	timers_reify (void)	819	timers_reify (EV_P)
523	{	820	{
524	while (timercnt && timers [0]->at <= now)	821	while (timercnt && ((WT)timers [0])->at <= mn_now)
525	{	822	{
526	struct ev_timer *w = timers [0];	823	struct ev_timer *w = timers [0];
527		824
528	event ((W)w, EV_TIMEOUT);	825	assert (("inactive timer on timer heap detected", ev_is_active (w)));
529		826
530	/* first reschedule or stop timer */	827	/* first reschedule or stop timer */
531	if (w->repeat)	828	if (w->repeat)
532	{	829	{
		830	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533	w->at = now + w->repeat;	831	((WT)w)->at = mn_now + w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));
535	downheap ((WT *)timers, timercnt, 0);	832	downheap ((WT *)timers, timercnt, 0);
536	}	833	}
537	else	834	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	835	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539	}
540	}
541		836
		837	event (EV_A_ (W)w, EV_TIMEOUT);
		838	}
		839	}
		840
542	static void	841	static void
543	periodics_reify (void)	842	periodics_reify (EV_P)
544	{	843	{
545	while (periodiccnt && periodics [0]->at <= ev_now)	844	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
546	{	845	{
547	struct ev_periodic *w = periodics [0];	846	struct ev_periodic *w = periodics [0];
		847
		848	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
548		849
549	/* first reschedule or stop timer */	850	/* first reschedule or stop timer */
550	if (w->interval)	851	if (w->interval)
551	{	852	{
552	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	853	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
553	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	854	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
554	downheap ((WT *)periodics, periodiccnt, 0);	855	downheap ((WT *)periodics, periodiccnt, 0);
555	}	856	}
556	else	857	else
557	ev_periodic_stop (w); /* nonrepeating: stop timer */	858	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
558		859
559	event ((W)w, EV_TIMEOUT);	860	event (EV_A_ (W)w, EV_PERIODIC);
560	}	861	}
561	}	862	}
562		863
563	static void	864	static void
564	periodics_reschedule (ev_tstamp diff)	865	periodics_reschedule (EV_P)
565	{	866	{
566	int i;	867	int i;
567		868
568	/* adjust periodics after time jump */	869	/* adjust periodics after time jump */
569	for (i = 0; i < periodiccnt; ++i)	870	for (i = 0; i < periodiccnt; ++i)
570	{	871	{
571	struct ev_periodic *w = periodics [i];	872	struct ev_periodic *w = periodics [i];
572		873
573	if (w->interval)	874	if (w->interval)
574	{	875	{
575	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	876	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
576		877
577	if (fabs (diff) >= 1e-4)	878	if (fabs (diff) >= 1e-4)
578	{	879	{
579	ev_periodic_stop (w);	880	ev_periodic_stop (EV_A_ w);
580	ev_periodic_start (w);	881	ev_periodic_start (EV_A_ w);
581		882
582	i = 0; /* restart loop, inefficient, but time jumps should be rare */	883	i = 0; /* restart loop, inefficient, but time jumps should be rare */
583	}	884	}
584	}	885	}
585	}	886	}
586	}	887	}
587		888
		889	inline int
		890	time_update_monotonic (EV_P)
		891	{
		892	mn_now = get_clock ();
		893
		894	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		895	{
		896	rt_now = rtmn_diff + mn_now;
		897	return 0;
		898	}
		899	else
		900	{
		901	now_floor = mn_now;
		902	rt_now = ev_time ();
		903	return 1;
		904	}
		905	}
		906
588	static void	907	static void
589	time_update (void)	908	time_update (EV_P)
590	{	909	{
591	int i;	910	int i;
592		911
593	ev_now = ev_time ();	912	#if EV_USE_MONOTONIC
594
595	if (have_monotonic)	913	if (expect_true (have_monotonic))
596	{	914	{
597	ev_tstamp odiff = diff;	915	if (time_update_monotonic (EV_A))
598
599	for (i = 4; --i; ) /* loop a few times, before making important decisions */
600	{	916	{
601	now = get_clock ();	917	ev_tstamp odiff = rtmn_diff;
		918
		919	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		920	{
602	diff = ev_now - now;	921	rtmn_diff = rt_now - mn_now;
603		922
604	if (fabs (odiff - diff) < MIN_TIMEJUMP)	923	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
605	return; /* all is well */	924	return; /* all is well */
606		925
607	ev_now = ev_time ();	926	rt_now = ev_time ();
		927	mn_now = get_clock ();
		928	now_floor = mn_now;
		929	}
		930
		931	periodics_reschedule (EV_A);
		932	/* no timer adjustment, as the monotonic clock doesn't jump */
		933	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
608	}	934	}
609
610	periodics_reschedule (diff - odiff);
611	/* no timer adjustment, as the monotonic clock doesn't jump */
612	}	935	}
613	else	936	else
		937	#endif
614	{	938	{
615	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	939	rt_now = ev_time ();
		940
		941	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
616	{	942	{
617	periodics_reschedule (ev_now - now);	943	periodics_reschedule (EV_A);
618		944
619	/* adjust timers. this is easy, as the offset is the same for all */	945	/* adjust timers. this is easy, as the offset is the same for all */
620	for (i = 0; i < timercnt; ++i)	946	for (i = 0; i < timercnt; ++i)
621	timers [i]->at += diff;	947	((WT)timers [i])->at += rt_now - mn_now;
622	}	948	}
623		949
624	now = ev_now;	950	mn_now = rt_now;
625	}	951	}
626	}	952	}
627		953
628	int ev_loop_done;	954	void
		955	ev_ref (EV_P)
		956	{
		957	++activecnt;
		958	}
629		959
		960	void
		961	ev_unref (EV_P)
		962	{
		963	--activecnt;
		964	}
		965
		966	static int loop_done;
		967
		968	void
630	void ev_loop (int flags)	969	ev_loop (EV_P_ int flags)
631	{	970	{
632	double block;	971	double block;
633	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	972	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
634		973
635	do	974	do
636	{	975	{
637	/* queue check watchers (and execute them) */	976	/* queue check watchers (and execute them) */
638	if (preparecnt)	977	if (expect_false (preparecnt))
639	{	978	{
640	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	979	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
641	call_pending ();	980	call_pending (EV_A);
642	}	981	}
643		982
644	/* update fd-related kernel structures */	983	/* update fd-related kernel structures */
645	fd_reify ();	984	fd_reify (EV_A);
646		985
647	/* calculate blocking time */	986	/* calculate blocking time */
648		987
649	/* we only need this for !monotonic clockor timers, but as we basically	988	/* we only need this for !monotonic clockor timers, but as we basically
650	always have timers, we just calculate it always */	989	always have timers, we just calculate it always */
		990	#if EV_USE_MONOTONIC
		991	if (expect_true (have_monotonic))
		992	time_update_monotonic (EV_A);
		993	else
		994	#endif
		995	{
651	ev_now = ev_time ();	996	rt_now = ev_time ();
		997	mn_now = rt_now;
		998	}
652		999
653	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1000	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
654	block = 0.;	1001	block = 0.;
655	else	1002	else
656	{	1003	{
657	block = MAX_BLOCKTIME;	1004	block = MAX_BLOCKTIME;
658		1005
659	if (timercnt)	1006	if (timercnt)
660	{	1007	{
661	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1008	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
662	if (block > to) block = to;	1009	if (block > to) block = to;
663	}	1010	}
664		1011
665	if (periodiccnt)	1012	if (periodiccnt)
666	{	1013	{
667	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1014	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
668	if (block > to) block = to;	1015	if (block > to) block = to;
669	}	1016	}
670		1017
671	if (block < 0.) block = 0.;	1018	if (block < 0.) block = 0.;
672	}	1019	}
673		1020
674	method_poll (block);	1021	method_poll (EV_A_ block);
675		1022
676	/* update ev_now, do magic */	1023	/* update rt_now, do magic */
677	time_update ();	1024	time_update (EV_A);
678		1025
679	/* queue pending timers and reschedule them */	1026	/* queue pending timers and reschedule them */
680	timers_reify (); /* relative timers called last */	1027	timers_reify (EV_A); /* relative timers called last */
681	periodics_reify (); /* absolute timers called first */	1028	periodics_reify (EV_A); /* absolute timers called first */
682		1029
683	/* queue idle watchers unless io or timers are pending */	1030	/* queue idle watchers unless io or timers are pending */
684	if (!pendingcnt)	1031	if (!pendingcnt)
685	queue_events ((W *)idles, idlecnt, EV_IDLE);	1032	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
686		1033
687	/* queue check watchers, to be executed first */	1034	/* queue check watchers, to be executed first */
688	if (checkcnt)	1035	if (checkcnt)
689	queue_events ((W *)checks, checkcnt, EV_CHECK);	1036	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
690		1037
691	call_pending ();	1038	call_pending (EV_A);
692	}	1039	}
693	while (!ev_loop_done);	1040	while (activecnt && !loop_done);
694		1041
695	if (ev_loop_done != 2)	1042	if (loop_done != 2)
696	ev_loop_done = 0;	1043	loop_done = 0;
		1044	}
		1045
		1046	void
		1047	ev_unloop (EV_P_ int how)
		1048	{
		1049	loop_done = how;
697	}	1050	}
698		1051
699	/*****************************************************************************/	1052	/*****************************************************************************/
700		1053
701	static void	1054	inline void
702	wlist_add (WL *head, WL elem)	1055	wlist_add (WL *head, WL elem)
703	{	1056	{
704	elem->next = *head;	1057	elem->next = *head;
705	*head = elem;	1058	*head = elem;
706	}	1059	}
707		1060
708	static void	1061	inline void
709	wlist_del (WL *head, WL elem)	1062	wlist_del (WL *head, WL elem)
710	{	1063	{
711	while (*head)	1064	while (*head)
712	{	1065	{
713	if (*head == elem)	1066	if (*head == elem)
…		…
718		1071
719	head = &(*head)->next;	1072	head = &(*head)->next;
720	}	1073	}
721	}	1074	}
722		1075
723	static void	1076	inline void
724	ev_clear (W w)	1077	ev_clear_pending (EV_P_ W w)
725	{	1078	{
726	if (w->pending)	1079	if (w->pending)
727	{	1080	{
728	pendings [w->pending - 1].w = 0;	1081	pendings [ABSPRI (w)][w->pending - 1].w = 0;
729	w->pending = 0;	1082	w->pending = 0;
730	}	1083	}
731	}	1084	}
732		1085
733	static void	1086	inline void
734	ev_start (W w, int active)	1087	ev_start (EV_P_ W w, int active)
735	{	1088	{
		1089	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1090	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1091
736	w->active = active;	1092	w->active = active;
		1093	ev_ref (EV_A);
737	}	1094	}
738		1095
739	static void	1096	inline void
740	ev_stop (W w)	1097	ev_stop (EV_P_ W w)
741	{	1098	{
		1099	ev_unref (EV_A);
742	w->active = 0;	1100	w->active = 0;
743	}	1101	}
744		1102
745	/*****************************************************************************/	1103	/*****************************************************************************/
746		1104
747	void	1105	void
748	ev_io_start (struct ev_io *w)	1106	ev_io_start (EV_P_ struct ev_io *w)
749	{	1107	{
		1108	int fd = w->fd;
		1109
750	if (ev_is_active (w))	1110	if (ev_is_active (w))
751	return;	1111	return;
752		1112
753	int fd = w->fd;	1113	assert (("ev_io_start called with negative fd", fd >= 0));
754		1114
755	ev_start ((W)w, 1);	1115	ev_start (EV_A_ (W)w, 1);
756	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1116	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
757	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1117	wlist_add ((WL *)&anfds[fd].head, (WL)w);
758		1118
759	fd_change (fd);	1119	fd_change (EV_A_ fd);
760	}	1120	}
761		1121
762	void	1122	void
763	ev_io_stop (struct ev_io *w)	1123	ev_io_stop (EV_P_ struct ev_io *w)
764	{	1124	{
765	ev_clear ((W)w);	1125	ev_clear_pending (EV_A_ (W)w);
766	if (!ev_is_active (w))	1126	if (!ev_is_active (w))
767	return;	1127	return;
768		1128
769	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1129	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
770	ev_stop ((W)w);	1130	ev_stop (EV_A_ (W)w);
771		1131
772	fd_change (w->fd);	1132	fd_change (EV_A_ w->fd);
773	}	1133	}
774		1134
775	void	1135	void
776	ev_timer_start (struct ev_timer *w)	1136	ev_timer_start (EV_P_ struct ev_timer *w)
777	{	1137	{
778	if (ev_is_active (w))	1138	if (ev_is_active (w))
779	return;	1139	return;
780		1140
781	w->at += now;	1141	((WT)w)->at += mn_now;
782		1142
783	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1143	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
784		1144
785	ev_start ((W)w, ++timercnt);	1145	ev_start (EV_A_ (W)w, ++timercnt);
786	array_needsize (timers, timermax, timercnt, );	1146	array_needsize (timers, timermax, timercnt, );
787	timers [timercnt - 1] = w;	1147	timers [timercnt - 1] = w;
788	upheap ((WT *)timers, timercnt - 1);	1148	upheap ((WT *)timers, timercnt - 1);
789	}
790		1149
		1150	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1151	}
		1152
791	void	1153	void
792	ev_timer_stop (struct ev_timer *w)	1154	ev_timer_stop (EV_P_ struct ev_timer *w)
793	{	1155	{
794	ev_clear ((W)w);	1156	ev_clear_pending (EV_A_ (W)w);
795	if (!ev_is_active (w))	1157	if (!ev_is_active (w))
796	return;	1158	return;
797		1159
		1160	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1161
798	if (w->active < timercnt--)	1162	if (((W)w)->active < timercnt--)
799	{	1163	{
800	timers [w->active - 1] = timers [timercnt];	1164	timers [((W)w)->active - 1] = timers [timercnt];
801	downheap ((WT *)timers, timercnt, w->active - 1);	1165	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
802	}	1166	}
803		1167
804	w->at = w->repeat;	1168	((WT)w)->at = w->repeat;
805		1169
806	ev_stop ((W)w);	1170	ev_stop (EV_A_ (W)w);
807	}	1171	}
808		1172
809	void	1173	void
810	ev_timer_again (struct ev_timer *w)	1174	ev_timer_again (EV_P_ struct ev_timer *w)
811	{	1175	{
812	if (ev_is_active (w))	1176	if (ev_is_active (w))
813	{	1177	{
814	if (w->repeat)	1178	if (w->repeat)
815	{	1179	{
816	w->at = now + w->repeat;	1180	((WT)w)->at = mn_now + w->repeat;
817	downheap ((WT *)timers, timercnt, w->active - 1);	1181	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
818	}	1182	}
819	else	1183	else
820	ev_timer_stop (w);	1184	ev_timer_stop (EV_A_ w);
821	}	1185	}
822	else if (w->repeat)	1186	else if (w->repeat)
823	ev_timer_start (w);	1187	ev_timer_start (EV_A_ w);
824	}	1188	}
825		1189
826	void	1190	void
827	ev_periodic_start (struct ev_periodic *w)	1191	ev_periodic_start (EV_P_ struct ev_periodic *w)
828	{	1192	{
829	if (ev_is_active (w))	1193	if (ev_is_active (w))
830	return;	1194	return;
831		1195
832	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1196	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
833		1197
834	/* this formula differs from the one in periodic_reify because we do not always round up */	1198	/* this formula differs from the one in periodic_reify because we do not always round up */
835	if (w->interval)	1199	if (w->interval)
836	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1200	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
837		1201
838	ev_start ((W)w, ++periodiccnt);	1202	ev_start (EV_A_ (W)w, ++periodiccnt);
839	array_needsize (periodics, periodicmax, periodiccnt, );	1203	array_needsize (periodics, periodicmax, periodiccnt, );
840	periodics [periodiccnt - 1] = w;	1204	periodics [periodiccnt - 1] = w;
841	upheap ((WT *)periodics, periodiccnt - 1);	1205	upheap ((WT *)periodics, periodiccnt - 1);
842	}
843		1206
		1207	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1208	}
		1209
844	void	1210	void
845	ev_periodic_stop (struct ev_periodic *w)	1211	ev_periodic_stop (EV_P_ struct ev_periodic *w)
846	{	1212	{
847	ev_clear ((W)w);	1213	ev_clear_pending (EV_A_ (W)w);
848	if (!ev_is_active (w))	1214	if (!ev_is_active (w))
849	return;	1215	return;
850		1216
		1217	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1218
851	if (w->active < periodiccnt--)	1219	if (((W)w)->active < periodiccnt--)
852	{	1220	{
853	periodics [w->active - 1] = periodics [periodiccnt];	1221	periodics [((W)w)->active - 1] = periodics [periodiccnt];
854	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1222	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
855	}	1223	}
856		1224
857	ev_stop ((W)w);	1225	ev_stop (EV_A_ (W)w);
858	}	1226	}
859		1227
860	void	1228	void
861	ev_signal_start (struct ev_signal *w)	1229	ev_idle_start (EV_P_ struct ev_idle *w)
862	{	1230	{
863	if (ev_is_active (w))	1231	if (ev_is_active (w))
864	return;	1232	return;
865		1233
		1234	ev_start (EV_A_ (W)w, ++idlecnt);
		1235	array_needsize (idles, idlemax, idlecnt, );
		1236	idles [idlecnt - 1] = w;
		1237	}
		1238
		1239	void
		1240	ev_idle_stop (EV_P_ struct ev_idle *w)
		1241	{
		1242	ev_clear_pending (EV_A_ (W)w);
		1243	if (ev_is_active (w))
		1244	return;
		1245
		1246	idles [((W)w)->active - 1] = idles [--idlecnt];
		1247	ev_stop (EV_A_ (W)w);
		1248	}
		1249
		1250	void
		1251	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1252	{
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	ev_start (EV_A_ (W)w, ++preparecnt);
		1257	array_needsize (prepares, preparemax, preparecnt, );
		1258	prepares [preparecnt - 1] = w;
		1259	}
		1260
		1261	void
		1262	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1263	{
		1264	ev_clear_pending (EV_A_ (W)w);
		1265	if (ev_is_active (w))
		1266	return;
		1267
		1268	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1269	ev_stop (EV_A_ (W)w);
		1270	}
		1271
		1272	void
		1273	ev_check_start (EV_P_ struct ev_check *w)
		1274	{
		1275	if (ev_is_active (w))
		1276	return;
		1277
		1278	ev_start (EV_A_ (W)w, ++checkcnt);
		1279	array_needsize (checks, checkmax, checkcnt, );
		1280	checks [checkcnt - 1] = w;
		1281	}
		1282
		1283	void
		1284	ev_check_stop (EV_P_ struct ev_check *w)
		1285	{
		1286	ev_clear_pending (EV_A_ (W)w);
		1287	if (ev_is_active (w))
		1288	return;
		1289
		1290	checks [((W)w)->active - 1] = checks [--checkcnt];
		1291	ev_stop (EV_A_ (W)w);
		1292	}
		1293
		1294	#ifndef SA_RESTART
		1295	# define SA_RESTART 0
		1296	#endif
		1297
		1298	void
		1299	ev_signal_start (EV_P_ struct ev_signal *w)
		1300	{
		1301	#if EV_MULTIPLICITY
		1302	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1303	#endif
		1304	if (ev_is_active (w))
		1305	return;
		1306
		1307	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1308
866	ev_start ((W)w, 1);	1309	ev_start (EV_A_ (W)w, 1);
867	array_needsize (signals, signalmax, w->signum, signals_init);	1310	array_needsize (signals, signalmax, w->signum, signals_init);
868	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1311	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
869		1312
870	if (!w->next)	1313	if (!((WL)w)->next)
871	{	1314	{
872	struct sigaction sa;	1315	struct sigaction sa;
873	sa.sa_handler = sighandler;	1316	sa.sa_handler = sighandler;
874	sigfillset (&sa.sa_mask);	1317	sigfillset (&sa.sa_mask);
875	sa.sa_flags = 0;	1318	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
876	sigaction (w->signum, &sa, 0);	1319	sigaction (w->signum, &sa, 0);
877	}	1320	}
878	}	1321	}
879		1322
880	void	1323	void
881	ev_signal_stop (struct ev_signal *w)	1324	ev_signal_stop (EV_P_ struct ev_signal *w)
882	{	1325	{
883	ev_clear ((W)w);	1326	ev_clear_pending (EV_A_ (W)w);
884	if (!ev_is_active (w))	1327	if (!ev_is_active (w))
885	return;	1328	return;
886		1329
887	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1330	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
888	ev_stop ((W)w);	1331	ev_stop (EV_A_ (W)w);
889		1332
890	if (!signals [w->signum - 1].head)	1333	if (!signals [w->signum - 1].head)
891	signal (w->signum, SIG_DFL);	1334	signal (w->signum, SIG_DFL);
892	}	1335	}
893		1336
894	void	1337	void
895	ev_idle_start (struct ev_idle *w)	1338	ev_child_start (EV_P_ struct ev_child *w)
896	{	1339	{
		1340	#if EV_MULTIPLICITY
		1341	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1342	#endif
897	if (ev_is_active (w))	1343	if (ev_is_active (w))
898	return;	1344	return;
899		1345
900	ev_start ((W)w, ++idlecnt);	1346	ev_start (EV_A_ (W)w, 1);
901	array_needsize (idles, idlemax, idlecnt, );	1347	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
902	idles [idlecnt - 1] = w;
903	}	1348	}
904		1349
905	void	1350	void
906	ev_idle_stop (struct ev_idle *w)	1351	ev_child_stop (EV_P_ struct ev_child *w)
907	{	1352	{
908	ev_clear ((W)w);	1353	ev_clear_pending (EV_A_ (W)w);
909	if (ev_is_active (w))	1354	if (ev_is_active (w))
910	return;	1355	return;
911		1356
912	idles [w->active - 1] = idles [--idlecnt];
913	ev_stop ((W)w);
914	}
915
916	void
917	ev_prepare_start (struct ev_prepare *w)
918	{
919	if (ev_is_active (w))
920	return;
921
922	ev_start ((W)w, ++preparecnt);
923	array_needsize (prepares, preparemax, preparecnt, );
924	prepares [preparecnt - 1] = w;
925	}
926
927	void
928	ev_prepare_stop (struct ev_prepare *w)
929	{
930	ev_clear ((W)w);
931	if (ev_is_active (w))
932	return;
933
934	prepares [w->active - 1] = prepares [--preparecnt];
935	ev_stop ((W)w);
936	}
937
938	void
939	ev_check_start (struct ev_check *w)
940	{
941	if (ev_is_active (w))
942	return;
943
944	ev_start ((W)w, ++checkcnt);
945	array_needsize (checks, checkmax, checkcnt, );
946	checks [checkcnt - 1] = w;
947	}
948
949	void
950	ev_check_stop (struct ev_check *w)
951	{
952	ev_clear ((W)w);
953	if (ev_is_active (w))
954	return;
955
956	checks [w->active - 1] = checks [--checkcnt];
957	ev_stop ((W)w);
958	}
959
960	void
961	ev_child_start (struct ev_child *w)
962	{
963	if (ev_is_active (w))
964	return;
965
966	ev_start ((W)w, 1);
967	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
968	}
969
970	void
971	ev_child_stop (struct ev_child *w)
972	{
973	ev_clear ((W)w);
974	if (ev_is_active (w))
975	return;
976
977	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1357	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
978	ev_stop ((W)w);	1358	ev_stop (EV_A_ (W)w);
979	}	1359	}
980		1360
981	/*****************************************************************************/	1361	/*****************************************************************************/
982		1362
983	struct ev_once	1363	struct ev_once
…		…
987	void (cb)(int revents, void arg);	1367	void (cb)(int revents, void arg);
988	void *arg;	1368	void *arg;
989	};	1369	};
990		1370
991	static void	1371	static void
992	once_cb (struct ev_once *once, int revents)	1372	once_cb (EV_P_ struct ev_once *once, int revents)
993	{	1373	{
994	void (cb)(int revents, void arg) = once->cb;	1374	void (cb)(int revents, void arg) = once->cb;
995	void *arg = once->arg;	1375	void *arg = once->arg;
996		1376
997	ev_io_stop (&once->io);	1377	ev_io_stop (EV_A_ &once->io);
998	ev_timer_stop (&once->to);	1378	ev_timer_stop (EV_A_ &once->to);
999	free (once);	1379	free (once);
1000		1380
1001	cb (revents, arg);	1381	cb (revents, arg);
1002	}	1382	}
1003		1383
1004	static void	1384	static void
1005	once_cb_io (struct ev_io *w, int revents)	1385	once_cb_io (EV_P_ struct ev_io *w, int revents)
1006	{	1386	{
1007	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1387	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1008	}	1388	}
1009		1389
1010	static void	1390	static void
1011	once_cb_to (struct ev_timer *w, int revents)	1391	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1012	{	1392	{
1013	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1393	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1014	}	1394	}
1015		1395
1016	void	1396	void
1017	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1397	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1018	{	1398	{
1019	struct ev_once *once = malloc (sizeof (struct ev_once));	1399	struct ev_once *once = malloc (sizeof (struct ev_once));
1020		1400
1021	if (!once)	1401	if (!once)
1022	cb (EV_ERROR, arg);	1402	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1023	else	1403	else
1024	{	1404	{
1025	once->cb = cb;	1405	once->cb = cb;
1026	once->arg = arg;	1406	once->arg = arg;
1027		1407
1028	ev_watcher_init (&once->io, once_cb_io);	1408	ev_watcher_init (&once->io, once_cb_io);
1029
1030	if (fd >= 0)	1409	if (fd >= 0)
1031	{	1410	{
1032	ev_io_set (&once->io, fd, events);	1411	ev_io_set (&once->io, fd, events);
1033	ev_io_start (&once->io);	1412	ev_io_start (EV_A_ &once->io);
1034	}	1413	}
1035		1414
1036	ev_watcher_init (&once->to, once_cb_to);	1415	ev_watcher_init (&once->to, once_cb_to);
1037
1038	if (timeout >= 0.)	1416	if (timeout >= 0.)
1039	{	1417	{
1040	ev_timer_set (&once->to, timeout, 0.);	1418	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1419	ev_timer_start (EV_A_ &once->to);
1042	}	1420	}
1043	}	1421	}
1044	}	1422	}
1045		1423
1046	/*****************************************************************************/
1047
1048	#if 0
1049
1050	struct ev_io wio;
1051
1052	static void
1053	sin_cb (struct ev_io *w, int revents)
1054	{
1055	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1056	}
1057
1058	static void
1059	ocb (struct ev_timer *w, int revents)
1060	{
1061	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1062	ev_timer_stop (w);
1063	ev_timer_start (w);
1064	}
1065
1066	static void
1067	scb (struct ev_signal *w, int revents)
1068	{
1069	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1070	ev_io_stop (&wio);
1071	ev_io_start (&wio);
1072	}
1073
1074	static void
1075	gcb (struct ev_signal *w, int revents)
1076	{
1077	fprintf (stderr, "generic %x\n", revents);
1078
1079	}
1080
1081	int main (void)
1082	{
1083	ev_init (0);
1084
1085	ev_io_init (&wio, sin_cb, 0, EV_READ);
1086	ev_io_start (&wio);
1087
1088	struct ev_timer t[10000];
1089
1090	#if 0
1091	int i;
1092	for (i = 0; i < 10000; ++i)
1093	{
1094	struct ev_timer *w = t + i;
1095	ev_watcher_init (w, ocb, i);
1096	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1097	ev_timer_start (w);
1098	if (drand48 () < 0.5)
1099	ev_timer_stop (w);
1100	}
1101	#endif
1102
1103	struct ev_timer t1;
1104	ev_timer_init (&t1, ocb, 5, 10);
1105	ev_timer_start (&t1);
1106
1107	struct ev_signal sig;
1108	ev_signal_init (&sig, scb, SIGQUIT);
1109	ev_signal_start (&sig);
1110
1111	struct ev_check cw;
1112	ev_check_init (&cw, gcb);
1113	ev_check_start (&cw);
1114
1115	struct ev_idle iw;
1116	ev_idle_init (&iw, gcb);
1117	ev_idle_start (&iw);
1118
1119	ev_loop (0);
1120
1121	return 0;
1122	}
1123
1124	#endif
1125
1126
1127
1128

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Comparing libev/ev.c (file contents): Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs. Revision 1.66 by root, Sun Nov 4 23:30:53 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs.
Revision 1.66 by root, Sun Nov 4 23:30:53 2007 UTC